YASKAWA Varispeed G7 Spécifications Page 51
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- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
52
7. Motor Protection
Motor Overload Detection
Motor rated current E2-01
Motor protection selection L1-01
Motor protection time constant L1-02
The inverter protects against motor overload with a built-in
electronic thermal overload relay.
Make the correct settings as follows.
（1）
Set E2-01 to the rated current value on the motor
nameplate. This set value becomes electronic thermal
overload relay reference value.
（2）According to the applicable motor, set L1-01 for the
overload protective function.
Motor has different cooling capacity depending on the
speed control range. Therefore, it is necessary to
select the protective characteristics of the electronic
thermal overload relay according to the allowable load
characteristics of the applicable motor.
The table below shows motor types and their allowable
load characteristics.
（3）Set L1-02 to the motor protective operation time.
(Normally, this setting is not needed.)
Set the electronic thermal overload relay protective
operation time when 150 ％ overload is applied after
continuous operation at rated current (hot-start).
＊
Factory setting: L1-02 = 1.0 min (150 ％ yield stress)
The following diagram shows an example of protective
operation time characteristics of the electronic thermal
overload relay [L1-02 = 1.0 minute, operation at 60 Hz, general-
purpose motor characteristics (when L1-01 is set to 1)].
・
The electronic thermal overload function monitors motor
temperature, based on the inverter output current,
frequency and time, to protect the motor from overheating.
When electronic thermal overload relay is enabled, an
“
OL1
”
error occurs, shutting OFF the inverter output and
preventing excessive overheating in the motor. When
operating with one inverter connected to one motor, an
external thermal relay is not needed.
・When operating several motors with one inverter, install
a thermal relay on each motor. In this case, set constant
L1-01 to 0.
・
Thermal overload calculated value is reset when the power
supply is turned OFF so that protection may not be enabled
in applications where the power supply is frequently turned
ON and OFF even if L1-01 is set to either 1, 2 or 3.
L1-01
L1-02
E2-01
Motor
protection
selection
0＝Disabled (No motor protection)
1＝Protects general-purpose motors.
2＝Protects inverter exclusive-use motors.
3＝Protects vector control motors.
Motor protection
time constant
Motor rated
current
1
＊
1.0 min
Setting range is from 10 to 200 ％
of the inverter rated output current.
0 to 3
0.1 to 5.0 min
Constant No.
Name Setting Range
Initial Value
＊ Initial value differs according to the inverter kVA setting or motor selection.
Operating Time (min.)
Cold Start
Hot Start
Motor Current (%)
E2-01 is 100 %.
10
7
3
1
0.4
0.1
0100150 200
Motor Protective Operation Time
Performs continuous operation at 6 to 50/60 Hz.
Performs continuous operation at 0.6 to 60 Hz.
Performs continuous operation at 0.06 to 60 Hz.
Torque
Rotation Speed
60 s Short Term
Continuous
Rating
Rated Rotation Speed = 100 ％ Speed
Max. Speed of
Frame No. 200LJ
or more
Max. Speed of
Frame Nos.
160MJ to 180LJ
Max. Speed of
Frame No. 132MJ
or less
Torque
Torque
60 s Short Term 60 s Short Term
Continuous
Rating
Continuous
Rating
Rated Rotation Speed = 100 ％ Speed Rated Rotation Speed
= 100 ％ Speed
Max. Speed of
Frame No. 200LJ
or more
Max. Speed of
Frame Nos.
160MJ to 180LJ
Max. Speed of
Frame No. 132MJ
or less
Rotation Speed Rotation Speed
Motor to operate with commercial power
supply. Has motor configuration where
cooling effect can be obtained when
operating at 50/60 Hz.
Has motor configuration where cooling
effect can be obtained even if operating in
low-speed area (approx. 6 Hz).
Has motor configuration where cooling
effect can be obtained even if operating at
super low-speed area (approx. 0.6 Hz).
Has motor configuration where cooling
effect can be obtained even if operating at
super low-speed area (approx. 0.6 Hz).
Detects motor overload protection (OL1) at
continuous operation at less than 50/60 Hz.
Inverter outputs a fault contact and the
motor coasts to a stop.
Motor Type and Allowable Load Characteristics
L1-01 Setting 1
Motor type
Allowable Load
Characteristics
Cooling
Electronic Thermal
Overload Relay Operation
(at 100% Motor Load)
23
1200.1
0
50
100
150
100
（60 Hz）
General-purpose Motor
(Standard Motor)
Constant Torque Inverter
Exclusive-use Motor(1:10)
Vector Exclusive-use Motor
(1:100)
Vector with PG Exclusive-use Motor
(1:1000)
60 s Short Term
Continuous
Rating
Torque
60 s Short Term
Continuous
Rating
Rated Rotation Speed = 100 ％ Speed
Max. Speed of
Frame No. 200LJ
or more
Max. Speed of
Frame Nos.
160MJ to 180LJ
Max. Speed of
Frame No. 132MHJ
or less
Rotation Speed
Cont
,
d
- Varispeed G 1
- It's Common Sense 2
- Varispeed G7 3
- APPLICATIONS 4
- Gentle on the environment 5
- Global Specifications 6
- 150％150％ 7
- User-friendly 8
- Digital Operator 9
- Monitor Display Procedure 10
- Specifications 11
- 11
- 200/400 V Class 12
- Software Functions 13
- 15
- 16
- 16
- Dimensions 17
- 18
- (Internal Sink) 19
- Inverter Heat Loss 19
- (Heatsink) 20
- Constants List 21
- Constant Descriptions 29
- Set Environment of Inverter 30
- Initialize Constants 30
- Set, Reset Password 30
- Select Control Method 30
- Set Input Voltage 30
- Set Motor Rated Current 31
- V/f pattern selection E1-03 32
- Set Accel/Decel Time 33
- Select Operation Method 34
- Select Operator Key 34
- Functions 34
- 2. Set Operation Conditions 35
- Soft Start 36
- Limit the Speed 37
- Operation to Avoid Resonance 37
- Setting Range 38
- Factory Setting 38
- momentary power loss 39
- Reset (Fault Restart) 40
- Temporary Hold of Accel/Decel 40
- Torque Detection 41
- Frequency Detection 42
- Carrier frequency C6-02 43
- （ ） 44
- 3. Select Stopping Method 45
- Use Input Signals 46
- Use Output Signals 47
- 5. Adjust Motor Torque 48
- （ ） 49
- （ ） 49
- Control Motor Slip 50
- 7. Motor Protection 51
- 8. PID Control 52
- Memobus Error Code 53
- Use Constant Copy Function 54
- Application Examples 55
- Example of Use with CNC Lathe 56
- Interface Circuit to NC 56
- （ ） 57
- Applications Examples 58
- Protective Functions 59
- Alarm Detection 61
- Operation Errors 62
- Typical Connection Diagrams 63
- Main Circuit Configuration 65
- Options, Peripheral Devices 66
- Option Cards 67
- RoHS Compliant 68
- Varispeed F7 69
- Type RFN3AL504KD 71
- Circuit Breaker (MCCB) 72
- Magnetic Contactor 73
- Noise Filter 74
- Without Case 75
- With Case 75
- Dimensions in mm 76
- Zero Phase Reactor 77
- Fuse and Fuse Holder 78
- Braking Unit 79
- Braking Resistor Unit 79
- ■Braking Unit 80
- Mass：0.2 kg 81
- （Model ERF-150WJ 81
- 200 V Class 82
- Drawing 1 Drawing 2 83
- 400 V Class 84
- Panel Cutout 86
- Model DGP 88
- Logic Circuit 90
- 0 to 10 V 90
- Accel Decel 90
- ■ VS Snap-in Module List 92
- MMMMNotes 93
- ＋15 V 20 mA 95
- 0 to ＋10 V (20 kΩ) 95
- 4 to 20 mA (250 Ω) or 95
- 0 to 10V (20 kΩ) 95
- Application of Motors 96
- MMMMSupplements 99
- (For P.94） 100
- Rotary motion 100
- Linear motion 100
- Terminology 101
- Global Service Network 102
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